EP0131499B1 - Verfahren zur Oxydation von kohlenwasserstoffhaltigen untertägigen sedimentären Lagerstätten - Google Patents

Verfahren zur Oxydation von kohlenwasserstoffhaltigen untertägigen sedimentären Lagerstätten Download PDF

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Publication number
EP0131499B1
EP0131499B1 EP84401286A EP84401286A EP0131499B1 EP 0131499 B1 EP0131499 B1 EP 0131499B1 EP 84401286 A EP84401286 A EP 84401286A EP 84401286 A EP84401286 A EP 84401286A EP 0131499 B1 EP0131499 B1 EP 0131499B1
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EP
European Patent Office
Prior art keywords
tube
injection
annular space
shaft
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84401286A
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English (en)
French (fr)
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EP0131499A1 (de
Inventor
Gérard Lefranc
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority to AT84401286T priority Critical patent/ATE24226T1/de
Publication of EP0131499A1 publication Critical patent/EP0131499A1/de
Application granted granted Critical
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
    • E21B36/001—Cooling arrangements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
    • E21B43/243—Combustion in situ

Definitions

  • the present invention relates to a process for the oxidation of underground sedimentary layers containing hydrocarbonaceous materials, according to which an inert or weakly oxidizing gas is injected in a first step and an oxygen-containing gas in a second step, into at least one well.
  • injection starting from the surface and opening into said underground layer so as to cause the partial or total oxidation of said hydrocarbon materials and the flow of these in the form of fluids to at least one production well located at a distance of said injection well and also opening into said underground layer, said injection well being constituted by a first central tube, by a second tube concentric with the first defining a first annular space and by a casing concentric with said second tube defining a second annular space and extending deeper into the underground layer than said first and second tubes.
  • Most of the installations for implementing the methods currently used comprise an injection well opening into the underground hydrocarbon layer and at least one production well located at a certain distance from the injection well.
  • the injection well comprises a central tube called “tubing" into which the oxygen-containing gas is injected and a tube concentric with said tubing into which is injected, for example, water called reaction water.
  • This causes either a modification of the viscosity of the hydrocarbon materials contained in the underground layer (case of petroleum), or their partial oxidation (case of coal), which, in both cases, promotes the flow of said hydrocarbon materials towards the production wells.
  • the subject of the invention is a process for the oxidation of underground hydrocarbon layers of the type set out in the preamble to claim 1, which also makes it possible to solve this safety problem and has the advantage of being simple to implement.
  • the method according to the invention is characterized in that said first and second tubes 4, 5 open into the lower part of said casing after passing through an annular seal placed between the second tube and the casing, a circulation of cold water being established in the second annular space during the oxygen injection step, in that, during the first step, the inert or slightly oxidizing gas is injected into the first central tube, in that, during of the second step, an oxidizing gas is injected into said central tube and the oxygen concentration of said oxidizing gas is gradually increased, and the reaction fluids injected into the first annular space are penetrated into the underground layer by regularly distributed perforations, formed in the side wall of the lower part of the casing, and in that during the second stage, the pressure is controlled where the reaction takes place in the di your underground sedimentary layers in order to detect an explosion hazard, the injection of reaction fluids being immediately stopped when a pressure variation corresponding to such an explosion hazard has been detected and instead injected into the annular space a safety fluid chosen from nitrogen, carbon dioxide and flooding water, the injection sequence
  • the oxygen concentration of the gas injected into the central tube is increased in a proportion of approximately 1% to approximately 30% of oxygen, and in a second stage, the oxygen concentration of said gas is increased to a maximum proportion of between 75% and 99.5%.
  • An injection well 1 starts from the free surface 2 of the land in question and opens into the underground layer 3 containing hydrocarbon materials.
  • the well 1 comprises a central tube 4, a second tube 5 concentric with the tube 4 and a casing 6 concentric with the tube 5.
  • the tube 5 defines with the tube 4 a first annular space 7, and the casing 6 defines with the tube 5 a second annular space 8.
  • the casing 6 extends deeper into the underground layer 3 than the tubes 4 and 5.
  • the tubes 4 and 5 open into the lower end of the casing 6 after passing through an annular seal 9 says "packer".
  • the side wall of the lower part of the casing 6 which is in the underground layer 3 is provided with perforations 10 regularly distributed. Means of injection, regulation and maintenance, called "Christmas tree", placed on the surface 2 are symbolized at 11.
  • the central tube 4 is a coiled tube unwound from a coil 12 fixed on the surface on a appropriate device (not shown in the figure); the tube 4 can also be constituted by tubular elements screwed to each other. However, it is preferred to use an unwound coiled tube which has the advantage of being able to be installed and removed quickly.
  • This tube 4 is preferably made of stainless or refractory metal.
  • an inert or slightly oxidizing gas is injected into the tube 4 so as to purge the bottom of the well, which makes it possible, during the next step, to start the oxidation in an area where the risks of 'explosion are minimal.
  • reaction water means water in the form of either liquid, vapor or foam.
  • a circulation of cold water is established in the annular space 8 so as to avoid excessive heating of the “packer” 9 (in fact, the packer, which consists of hydrocarbon elements, rubber type, does not support not too high temperatures).
  • This circulation of cooling water can advantageously be placed in the annular space 8 using a conventional device (not shown in the figure) of the “Coiled Tubing” or “Snubbing” type (elements tubular).
  • the first purging step lasts about a few days
  • the first stage of the second oxidation step oxygen concentration of the gas injected into the tube 4 increasing from about 1% to about 30%
  • the duration of the second stage of this second stage is approximately 350 days to 700 days.
  • the injection of a safety fluid into the annular space 7 is approximately 1 hour.
  • the rate of injection of the oxidizing gas into the tube 4 can range from 1000 to 10,000 m 3 / h and that the rate of injection of the reaction water into space annular 7 can be 10 liters per m 3 of oxidizing gas injected into the tube 4.
  • the process according to the invention avoids any risk of explosion during the oxidation of underground layers containing hydrocarbonaceous materials, on the one hand thanks to the first purging step, on the other hand thanks to the possibility for monitoring reactions by injecting a safety fluid in the event of an incident.

Landscapes

  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Solid Wastes (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Fire-Extinguishing Compositions (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Claims (6)

1. Verfahren zur Oxidation von sedimentären untertägigen Lagerstätten (3), die kohlenwasserstoffhaltige Materialien enthalten, bei dem man in wenigstens einen Injektionsschacht (1), der von der Oberfläche (2) kommt und in die untertägige Lagerstätte (3) mündet, in einer ersten Stufe ein inertes oder wenig oxidierendes Gas und in einer zweiten Stufe ein sauerstoffhaltiges Gas derart einspritzt, dass man die teilweise oder vollständige Oxidation dieser kohlenwasserstoffhaitigen Materialien und das Abfliessen derselben in fliessfähigem Zustand zu wenigstens einem Produktionsschacht, der im Abstand von dem Injektionsschacht (1) angeordnet ist und auch in die untertägige Lagerstätte mündet, hervorruft, wobei der Injektionsschacht (1) aus einem ersten mittigen Rohr (4), einem zu dem ersten konzentrischen zweiten Rohr (5), das einen ersten Ringraum (7) begrent, und einem zu dem zweiten Rohr (5) konzentrischen Schachtrohr (6), das einen zweiten Ringraum (8) begrenzt und sich tiefer in die untertägige Schicht (3) als das erste und das zweite Rohr erstreckt, besteht, dadurch gekennzeichnet, dass das erste Rohr und das zweite Rohr (4 und 5) in den unteren Teil des Schachtrohres (6) münden, nachdem sie eine zwischen dem zweiten Rohr (5) und dem Schachtrohr (6) angeordnete ringförmige Dichtverbindung (9) durchquert haben, wobei eine Kaltwasserzirkulation in dem zweiten Ringraum (8) während der Stufe des Sauerstoffeinspritzens erfolgt, dass man während der ersten Stufe das inerte oder wenig oxidierende Gas in das erste mittige Rohr (4) einspritzt, dass man während der zweiten Stufe in das mittige Rohr (4) ein oxidierendes Gas einspritzt und nach und nach die Sauerstoffkonzentration dieses oxidierenden Gases steigert und in den ersten Ringraum (7) Reaktionswasser einspritzt, wobei die eingespritzten Reaktionsfliessmittel in die untertägige Schicht (3) durch regelmässig verteilte Perforationen (10), die in der Seitenwand des unteren Teils des Schachtrohres (6) angeordnet sind, eindringen, und dass man während der zweiten Stufe den Druck dort, wo die Reaktion in den sedimentären untertägigen Lagerstätten (3) stattfindet, kontrolliert, um eine Explosionsgefahr festzustellen, wobei das Einspritzen der Reaktionsfliessmittel unmittelbar angehalten wird, wenn eine Veränderung des Druckes entsprechend einer solchen Explosionsgefahr festgestellt wurde, und dass man in den Ringraum (7) ein Sicherheitsfliessmittel einspritzt, das man unter Stickstoff, Kohlendioxid und Überflutungswasser auswählt, wobei die Folge des Einspritzens der Fliessmittel gemäss den beiden obigen Stufen wieder aufgenommen wird, nachdem die Störung unter Kontrolle gebracht wurde.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass man während der zweiten Stufe in einem ersten Stadium die Sauerstoffkonzentration des in das mittige Rohr (4) eingespritzten Gases in einem Verhältnis von etwa 1 % bis etwa 30% steigert und in einem zweiten Stadium die Sauerstoffkonzentration dieses Gases bis zu einem Maximalverhältnis zwischen 75% und 99,5% steigert.
3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Dauer der ersten Stufe einige Tage beträgt, die Dauer des ersten Stadiums der zweiten Stufe etwa 15 Tage beträgt und die Dauer des zweiten Stadiums der zweiten Stufe etwa 350 Tage bis 700 Tage beträgt.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Dauer des Einspritzens eines Sicherheitsfliessmittels in den ersten Ringraum (7) etwa 1 h beträgt.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass man das oxidierende Gas in das mittige Rohr mit einem Durchsatz von 1000 bis 10000 m3/h einspritzt.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass man das Wasser in den ersten Ringraum (7) mit einem Durchsatz von 10 11m3 des in das mittige Rohr (4) eingespritzten oxidierenden Gases einspritzt.
EP84401286A 1983-06-30 1984-06-21 Verfahren zur Oxydation von kohlenwasserstoffhaltigen untertägigen sedimentären Lagerstätten Expired EP0131499B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84401286T ATE24226T1 (de) 1983-06-30 1984-06-21 Verfahren zur oxydation von kohlenwasserstoffhaltigen untertaegigen sedimentaeren lagerstaetten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8310829 1983-06-30
FR8310829A FR2548207B1 (fr) 1983-06-30 1983-06-30 Procede d'oxydation de couches sedimentaires souterraines contenant des matieres hydrocarbonees

Publications (2)

Publication Number Publication Date
EP0131499A1 EP0131499A1 (de) 1985-01-16
EP0131499B1 true EP0131499B1 (de) 1986-12-10

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Application Number Title Priority Date Filing Date
EP84401286A Expired EP0131499B1 (de) 1983-06-30 1984-06-21 Verfahren zur Oxydation von kohlenwasserstoffhaltigen untertägigen sedimentären Lagerstätten

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EP (1) EP0131499B1 (de)
AT (1) ATE24226T1 (de)
AU (1) AU556316B2 (de)
BR (1) BR8403250A (de)
DE (1) DE3461669D1 (de)
FR (1) FR2548207B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6443344A (en) * 1987-08-12 1989-02-15 Univ Tohoku Vessel for underground chemical reaction
CN1320253C (zh) * 1998-05-29 2007-06-06 柴兆喜 于煤层直接生产煤气的矿井
ITMI20101095A1 (it) * 2010-06-17 2011-12-18 Antonino Gambino Dispositivo di arresto di petrolio proveniente da giacimento
CN108386171B (zh) * 2018-02-22 2020-02-14 中海石油(中国)有限公司 深水浊积砂岩注水开发油藏油井见水后注水强度优化方法
CN115163021B (zh) * 2022-07-13 2023-11-03 中国矿业大学 一种注水注氮抽采瓦斯封孔装置及钻孔布置方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1080040A (fr) * 1952-05-16 1954-12-06 Union Rheinische Braunkohlen Procédé permettant de maintenir une pression constante dans les gisements de pétrole et de gaz naturel
DE1247238B (de) * 1966-08-12 1967-08-17 Erdoel Ag Hamburg Deutsche Verfahren zum Foerdern von Bitumina aus Lagerstaetten
US3987852A (en) * 1974-09-30 1976-10-26 Terry Ruel C Method of and apparatus for in situ gasification of coal and the capture of resultant generated heat
US4042026A (en) * 1975-02-08 1977-08-16 Deutsche Texaco Aktiengesellschaft Method for initiating an in-situ recovery process by the introduction of oxygen
DE2623318A1 (de) * 1975-06-02 1976-12-23 Inst Nat Des Ind Extractives I Verfahren und vorrichtung zum verschwelen fester brennstoffe unter tage
CA1170979A (en) * 1981-01-28 1984-07-17 Guy Savard In situ combustion for oil recovery

Also Published As

Publication number Publication date
FR2548207B1 (fr) 1987-06-05
EP0131499A1 (de) 1985-01-16
AU556316B2 (en) 1986-10-30
FR2548207A1 (fr) 1985-01-04
AU2999784A (en) 1985-01-03
ATE24226T1 (de) 1986-12-15
BR8403250A (pt) 1985-06-11
DE3461669D1 (en) 1987-01-22

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